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Hey. Let's say I ofter ran into situation where if my IG friend's psychic power hits - I'm totally screwed.

Canoptek Tomb Spyder's Gloom Prism seems like a nice counter measure:

Each time the enemy unit tries to target Spyder or a friendly unit within 3", with psychic power, roll a D6 if Psychic Test is passed. On 4+ the power is nullified and has no effect.

I know most of you are familiar with this upgrade, but I'm bringing it up for the exact wording.
Anyway - 1 Gloom Prism is only 50% nullification chance.

So than in Canoptec Spyder entry we read:

Any Canoptek Spyder may take a Gloom Prism - 15 pts per model

So it clearly states you can have up to three Gloom Prisms in the unit.

The way I understand it - if enemy targets Spyder unit or a friendly Unit which is in 3" rang from EVERY spyder in that unit - you can roll 3 times for nullification, as they are 3 separate items and it's not stated anywhere that additional Prisms have no effect, or that you cannot use multiple Prisms to shield same unit.

Also:
- prisms are not a save, so they are not limited by "pick the 1 best save" rule
- for ex. Ether Crystals have additional rule that changes how they work if enemy is in range of multiple Crystals, but doesn't disallow it
- no such regulation for Prisms

What do you think? I would probably use just 2 spyders, to have 2 D6 rolls, but wanted to explain situation above clearly.

If you paid the points for 3, I'd let you roll 3 times. I can't see a counter-argument in the rules, and it doesn't break the game.

Agreed, it doesn't have the wording of a Psychic hood where it states you have to pick only one Librarian/Hood that is in range to make the test.

I'm actually not so sure.

Each time the enemy unit tries to target Spyder or a friendly unit within 3", with psychic power, roll a D6 if Psychic Test is passed. On 4+ the power is nullified and has no effect.

The single dice is rolled if circumstance allows it. If a spider is targeted, or a unit is targeted and it's within 3" of a spider with this upgrade... you get to roll that nullification dice. It doesn't matter if there are three spiders, or just one - the requirements are met once, so you roll the dice once. Having more than one Gloom Prism just allows one to spread the requirements to allow for nullification - I don't see how it would trigger multiple rolls.

In other words: Is the targeted unit within 3" of a spider with Gloom Prism? Yes? It gets to roll 1D6.

Plus... multiple rolls wouldn't really help at all. It would mean you would need to get 4+ on ALL the rolls to nullify the power.

Kharrak wrote:
Plus... multiple rolls wouldn't really help at all. It would mean you would need to get 4+ on ALL the rolls to nullify the power.

While I'm not convinced by your interpretation, that additional "plus..." part is toatlly out of nowhere and would mean a very clunky mechanic.

Each Spyder gets an item, and they are all independent items even if they are all of same type.
What you say would apply to unit that requires all it's models to take specific upgrade... Than I would agree.
But here wording is clearly stating Spyder not Spyder Unit. So it refers to model, and with that each model can be treated separately.
Imho.

This is the same issue we had with Runic Weapons when Space Wolves were released. They forgot to include the "one or more" wording in the description of the item, so expect them to correct it when the FAQ is released.

As written right now you can roll multiple times, but as intended I'm sure it's supposed to be a single roll much like a psychic hood.

The present wording is ambiguous. Based on how the SW Runic Weapon was errata'd, and the ruling for the Wolf Tail Talisman, you'll only get one roll.